So do you think it's the pillow that she likes lying on (or the comfort of it kind of surrounding her) or do you think she likes being elevated?

A couple of things you could try as an alternative:

- Get a 'snuggle bed' to put in the cot so she is more snug
- Elevate the head of the cot (you could try rolling up a couple of towels and putting them beneath the top of the mattress).
- Or you could try combining those two options - do both!

Just a suggestion anyway!